50 Ideas You Really Need to Know is a 38-book series with 38 released primary works first released in 2007 with contributions by Ben Dupré, Joanne Baker, Tony Crilly, Edward Russell-Walling, Adrian Furnham, Edmund Conway, Mark Henderson, Peter Stanford, Philip Wilkinson, John Sutherland, Ian Crofton, Robin Cross, Tom Chatfield, Susie Hodge, Martin Redfern, Richard Watson, Moheb Costandi, and Gareth Southwell.